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What is the time required to travel along the parallel of latitude 60°N between meridians 010°E and 030°W at a groundspeed of 480 kt?
  • A
    1 hour 15 minutes
  • B
    1 hour 45 minutes
  • C
    2 hours 30 minutes
  • D
    5 hours 00 minutes

Distance = Cos latitude x difference in longitude x 60

Distance = Cos 60˚ x 40 x 60 = 1200 NM

GS: 480 kts

Time = Distance / Speed = 1200 / 480 = 2 hours and 30 minutes

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